The 29-year-old Sri Lankan beauty joined the micro-blogging site in 2009.
"1 million finally on twitter!!! I owe this one to Salman Khan," she tweeted.
Jacqueline made her acting debut in the 2009 Bollywood fantasy movie 'Aladin' opposite Amitabh Bachchan and Ritesh Deshmukh followed by 'Jaane Kahan Se Aayi Hai' and 'Murder 2'.
But her stint as a psychiatrist in the Salman-starrer 'Kick' gave her the maximum popularity as an actress.
The actress will be next seen in upcoming action thriller 'Roy'.